Sprocket



FIG. 1 is a front elevation view.

FIG. 2 is a cross-sectional view at line 2-2 in FIG. 1.

FIG. 3 is a rear elevation view.

FIG. 4 is a side plan view; and,

FIG. 5 is a front perspective view.

The broken line showing of the sprocket is included for the purpose of illustrating portions of the sprocket and forms no part of the claimed design. 

The ornamental design for a sprocket, as shown and described. 